inspector: make the classes-list toolbar sensitive
inspector: make the classes-list toolbar sensitive

alexlarsson/gtk,jadahl/gtk,Adamovskiy/gtk,alexlarsson/gtk,grubersjoe/adwaita,jadahl/gtk,Adamovskiy/gtk,jigpu/gtk,grubersjoe/adwaita,Adamovskiy/gtk,jigpu/gtk,Adamovskiy/gtk,jadahl/gtk,jadahl/gtk,alexlarsson/gtk,jessevdk/gtk,chergert/gtk,Lyude/gtk-,chergert/gtk,alexlarsson/gtk,ahodesuka/gtk,Adamovskiy/gtk,jadahl/gtk,davidgumberg/gtk,alexlarsson/gtk,jessevdk/gtk,davidgumberg/gtk,Lyude/gtk-,jadahl/gtk,ahodesuka/gtk,davidgumberg/gtk,grubersjoe/adwaita,Sidnioulz/SandboxGtk,davidgumberg/gtk,jigpu/gtk,grubersjoe/adwaita,Adamovskiy/gtk,chergert/gtk,jessevdk/gtk,jigpu/gtk,jessevdk/gtk,alexlarsson/gtk,ahodesuka/gtk,Lyude/gtk-,alexlarsson/gtk,jessevdk/gtk,grubersjoe/adwaita,jigpu/gtk,jessevdk/gtk,Adamovskiy/gtk,ahodesuka/gtk,chergert/gtk,chergert/gtk,chergert/gtk,Sidnioulz/SandboxGtk,ahodesuka/gtk,jadahl/gtk,Lyude/gtk-,Sidnioulz/SandboxGtk,Lyude/gtk-,grubersjoe/adwaita,alexlarsson/gtk,jigpu/gtk,jadahl/gtk,chergert/gtk,grubersjoe/adwaita,davidgumberg/gtk,Adamovskiy/gtk,jigpu/gtk,davidgumberg/gtk,jigpu/gtk,grubersjoe/adwaita,Sidnioulz/SandboxGtk,Sidnioulz/SandboxGtk,Sidnioulz/SandboxGtk,davidgumberg/gtk,jessevdk/gtk,ahodesuka/gtk,ahodesuka/gtk,Lyude/gtk-,davidgumberg/gtk,ahodesuka/gtk,Lyude/gtk-,chergert/gtk,Lyude/gtk-